Recording apparatus.



R. L. EDDY RECORDING APPARATUS.

APPLICAHON HLED JULY 31,1914.

Patented Dec. 5, 1916.

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RECORDING APPARATUS.

APPLICATION FILED JULY 3!. 1914.

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RECORDING APPARATUS.

APPLICATION FILED JULY-31, 1914.

Patented Dec. 5, 1916.

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RAY L. EDDY, OF CHICAGO, ILLINOIS.

RECORDING APPARATUS.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed July 31, 1914. Serial No. 854,327.

To all whom it may concern:

Be it known that I, RAY L. EDDY, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Recording Apparatus, ofwhich the following is a specification.

The present invention relates to an apparatus for making a recordshowing the density of smoke, dust, or similar substance emit ted from agiven source.

The objects of the present invention are to provide a casing having arecord sheet or chart therein, and to provide means for moving saidrecord sheet, which means will be automatically actuated.

A further object of the invention is to so construct the means formoving the record sheet as to have the power for operating the samereplenished at periodical intervals.

A further object of the invention is to provide means for scavenging orcleaning out the smoke nozzle at intervals.

A further object of the invention is to prepare the gases prior to theirprojection on the record sheet, by subjecting them to the action ofheat.

A further object of the invention is to utilize the heat which dries thegases to maintain the interior of the casing in a dry condition, therebypreventing corrosion of the operating parts of the mechanism.

A further object of the invention is to provide means for admittingatmospheric pressure to the interior of the casing, and to providevalvular means for controlling the amount of such pressure admitted.

A further object of the invention is to provide communication betweenthe interior of the casing and a suction pipe, and to establish avalvular means for controlling such communication.

A iurther object of the invention is to actuate this valvular meansautomatically and at periodical intervals.

The invention further consist in the features of construction andcombinations of parts hereinafter described and claimed.

In the drawings: Figure 1 is a side view of the mechanism of the presentinvention, with the casing in section; Fig. 2 is a front view of themechanism of the present invention, with the means which controls theflow of outside air through the interior of the casing in section; Fig.3 is a side view of the mechanism of the present invention, looking uponthe opposite side from the side shown in Fig. 1; Fig. A is a plan viewof the casing showing the various pressure connections leading theretoas well'as the conduit for the smoke, and with the record sheet feedingmechanism removed; Fig. 5 is a detail showing the valve for controllingcommunication between the interior of the easing and the suction pipe,with the valve in closed position; Fig. 6 is a view similar to Fig. 5showing the valve in open position; Fig. 7 is a section showing the mainspring of the record sheet feeding means operating mechanism; Fig. 8 isa section of the smoke nozzle; Fig. 9 is a face view of the recordsheet; Fig. 10 is a section of such sheet; and Fig. 11 is a view showingthe sheet unfolded, and showing the record thereon.

The present invention, as stated, relates to a machine for recording thedensity of smoke, dust, or similar substance coming from a given source.The operation generally is to draw from the smoke stack or other part aportion of the smoke or dust traveling therethrough, and to project andallix such smoke or dust upon a recording sheet, whereby a record ismade showing the density of the smoke or dust passing through the stackor other part at any given time.

Inasmuch as the device is, as has been stated, adaptable to record thedensity of smoke, dust or similar substances the term smoke when usedhereinafter will be understood to include smoke, dust or similarsubstances, and with this understanding the term smoke will hereafteralone be used in order to eliminate prolixity in the specification.

As illustrated in the drawings, the mechanism of the present inventionis contained within the casing 12 which consists of a base portion 13and an upper dome shaped portion 14:, the dome shaped portion is asshown made of glass or other transparent substances, although the form,size and material of which the casing is composed is entirely optionalwith the manufacturer, and the construction illustrated is merely forthe purpose of showing one construction adapted for the purpose.

Inclosed within the casing is a record sheet 15 which may be of anysuitable shape and material, one form is illustrated in detail in Figs.9, l0, and 11, and in the form there illustrated consi'sts of a body 16having its edges folded back, as at 17, The portion 18 between thefolded portion 17 is intended to receive the record. Although this formof record sheet is not to be considered as a limitation upon the presentinvention, it is a very efficient form of sheet, since the smoke whendischarged. from the smoke nozzle will spread and blur to a greater orless degree over the surface of the sheet, producing a ragged edge oroutline. The ragged portion in the form of record sheet illustrated,will come upon the folded parts 17, and when these parts are foldedback, as in Fig. 11, it will leave a clear cut record down the center ofthe body 16, whereby a clear and sharp record is obtained. This recordsheet 15 is fed from a reel19 to a reel 20 and in travel- 7 ing from onereel to the other passes around idler rollers 21. The main feed rollerfor the'record sheet or tape is the roller designated by the numeral 23,and this roller is mounted'on a shaft 2 1-, which, in the constructionshown, is driven by a tension operated mechanism in the nature of clockwork mechanism. This mechanism comprises a balance wheel 25 whichoperates a lever 26 actuating upon an escapement wheel 27, which inturn, actuates a series of gears and pinions clearly illustrated in Fig.3. A movable spring pressed roller 22 is placed in operative relation tothe main roller 23 and serves to keep the record sheet in engagementwith the periphery of the feed roller to insure movement of the tape.

Upon the shaft 2% is mounted and secured the reel'19and a pulley 28, andupon a cross shaft 29 is mounted and secured'the reel 20 and a pulley29, a connection between'the pulleys 2S and 29 being furnished by meansof a belt or cable 30. In the construction shown, this cable is in theform of a coil spring, so that the necessary slippage of the belt isallowed as the roll of record strip increases or diminishes upon thereels 19 or 20.

It is advisable, from' a practical standpoint, to have the mechanismrewound automatically at periodical intervalsfand to provide means forthis rewmdmg operation casing12 above the diaphragm 31 contains all theapparatus of the invention within the dome 14, the lower half of thechamber being a suction chamber. In that portion 32 of the chamber 12,which lies below the diaphragm 31, is entered one end of a pipe orconduit 33 (see Fig. 4). This pipe or conduit is connected to what maybe termed a suction pipe 34-, and this suction pipe leads to anysuitable form of suction creating means, as, for instance, a steaminjector. lhese suction creating means are so well known in mechanicalarts that it is not deemed necessary to illustrate any particular meansin connection with the present invention.

A suction pipe 35, which leads from the interior of the stack, enters achamber 36 in a pressure regulator 37 (see Fig. 2); a diaphragm orequivalent member 38 divides the interior of-this regulator into thechamer 36 and achamber 39, and outside air enters the chamber 39 througha suitable conduit 40 (see Figs. 2 and 4). An outlet is provided forsaid outside air. consisting of a perforated sleeve 11 (see Figs. 2 and4t), and sliding inside of this sleep is a similarly perforated tube 42joined to a stem 43, which in turn is joined to the backing for thediaphragm 38. As this diaphragm moves in and out in accordance with thesuction exerted in the chamber 36, it pulls the tube 42 in and out, withthe result that the openings in the sleeve 4-1 are increased ordecreased in area as the case may be. With the greater suction, thediaphragm is drawn toward the chamber 36, with the result that theopenings in the sleeve 4-1 are restricted so that the volume of outsideair passing in the interior of the casing is decreased. In this mannerthe vacuum within the casing l-i is maintained slightly below the vacuumin the stack, and the same ratio of vacuum is maintained between theinterior of the stack and easing, although the vacuum within the stackvaries.

When the suction exerted in the chan'iher 32 is sufficient to cause aflexing of the diaphragm 31, said diaphragm is pulled downward, with theresult that a rod 44; is pulled downward, and a. spring 4:6 is provided(see Figs. 2 and 3), attached at its upper end to a pin 47 in a plate48, which plate forms a portion of a support, that consists of theplate-48 and a plate 1-9 (see Fig. 2). The spring 46 at its other end isattached to a pin extending from a collar 5O attached to the rod 44. Thefunction of the spring is to assist the rod and diaphragm in returningto normal or raised position. The diaphragm rises very shortly after ithas descended, and it does not remain in its collapsed or down positionfor any material length of time.

To revert again to the movements of the diaphragm 31, as previouslystated, when a sufficient suction is exerted below this diaphragm, or inother words, when a suiiicient vacuum is created in the chamber 32, the

diaphragm is pulled downward, with the resultant pulling down of the rod421-. This rod 14 has connected to it a pin 50 traveling within a slot51 of the plate 48 (see Figs. 5 and 6), and this pin extends beyond theplate and enters a slot 52 in a pivoted member 53, said member beingpivoted upon the main or cross shaft 24. Attached to one extremity ofthis member 53 is a spring pressed dog 55, and when the rod 44: ispulled downward it raises this dog 55 into the position shown in Fig. 6;then when the rod descends it lowers that end of the member. 53 carryingthe pawl 55, with the result that said pawl engages with a tooth of aratchet member 56 and revolves this ratchet member a step. This ratchetmember, as shown in Fig. 7, carries the main end of a spring 57, theother end of which is attached to a spring barrel 58, which barrel hasprojecting therefrom a series of pins 59. The shaft 24: is afiixed tothe disk 58 and is driven by a spring 57 and this spring, therefore,constitutes the main spring of the clock work mechanism, so that theperiodical rewinding of this spring regenerates power to operate theclock work.

The member 53 has an arm 58 extending therefrom, and when the rod 1a ispulled down, this arm engages with a pin 59 on a plate 60, which plateis pivoted upon a cross shaft 61. As this plate is pulled downward, itrocks the cross shaft 61, with the result that the arm 62, carrying thevalve 63 which controls communication between the suction pipe 34: andthe interior of the casing, is thrown to open position as shown in Fig.6. It is desirable to maintain this valve in open position for a periodof time, first, in order to suck the smoke out of the casing,and,second, to change the atmospheric pressure above the diaphragm, soas to allow the spring 46 to act to pull the diaphragm back to raisedposition; and to maintain this valve open, I attach a finger 62 to aplate 60, which finger carries a pin 63 traveling within a slot 64 insaid plate, and this finger is spring pressed, so that it is normallymaintained in the position shown in Fig. 5. When the plate is pulleddownward, as in Fig. 6, the end of the finger 62 is lying above one ofthe pins 59 on the disk 58, and as this disk revolves it forces thisfinger upward, so that, when the pin 63 on the finger has reached theend of the slot 64, it commences to rock said plate upward, with theresult that a spring pressed roller 65 carried by a pivoted arm 66assumes a position where it forces the plate 60 up into position shownin Fig. 5, rocking the shaft 61 and again closing the valve as in Fig.5.

The action of the pivoted arm 66 is as follows: When the plate is throwndownward, as in Fig. 6, the roller 65 rests upon a flat edge 67 on saidplate, and as the plate is turned, the roller passes from this portion6? over the corners 68 and onto another fiat portion 69 of the saidplate, with the result that when it reaches the latter flat portion apressure is exerted by the tension on the arm 66 which tends to swingthe plate upwardly, as will be readily understood by referring to Figs.5 and 6. By this means, the valve 63 is open when the diaphragm 31 islowered and remains open for a period of time. The effect of opening thevalve is to establish communication between the interior of the casingand the interior of a suction pipe 3%, whereby the suction or vacuumbelow the diaphragm is broken and the spring 416 acts to pull thediaphragm upward. This upward movement of the diaphragm takes placedirectly after the downward movement, since the vacuum below thediaphragm is immediately reduced when the valve is opened.

If there is a small vacuum existing in the stack, it is obvious that aconsiderable amount of outside air can be admitted to the interior ofthe casing and still have a lower vacuum in the casing than in thestack, and should the vacuum increase in the stack less outside airwould be admitted to the casing to maintain the same relative degree ofvacuum between the stack and casing. The vacuum in the chamber is, ofcourse, lower than in the stack, whereby the smoke is drawn from thestack.

A smoke nozzle 70 is provided, which nozzle is mounted, as shown in Fig.1, in position to deliver smoke from the mouth thereof against therecord sheet, and the smoke is conveyed to the nozzle by means of a pipeor tube 71, and surrounding this pipe or tube is a jacket 72, and steamor other heat is applied to this jacket, so that the smoke in travelingthrough the tube 71 is properly prepared, it being desirable to preparethe gas prior to passage through the nozzle to avoid clogging of thesame. Various means heretofore have been used for preparing these "ases,such as passing them through or over a filter of cotton, sulfurite acid,calcium chlorid, or similar substances. By the heated jacket which Iemploy, the holders, etc., necessary for drying the gases by chemicalsis eliminated, and, moreover, by using this jacket, the interior of theeasing is maintained in a dried condition, which tends to eliminatecorrosion of the working portions of the mechanism.

In order to secure a correct record, it is necessary to maintain thesmoke nozzle and especially the discharge orifice in a clean condition,and to accomplish this end, in addition to preparing the gases, Iprovide an added preventative in the form of mechanical means, and thisconsists of a shaft 71 to which is connected an arm 72 carrying astem 73 which extends within the nozzle, as shown in Fig. 8. This shaft 71 isconnected to the rod 44, so that every time this, red moves up or downthe shaft will -rock.- As the rodmoves down, it swmgs the arm 72downwardly, with the result that the stem 73 is forced inwardfcausingthe alinement with the record sheet during the cleansing operation,whereby no matter which may have accumulated in the nozzle is projectedthereon.

. v Theoperation briefly is as follows: When suflicient vacuum iscreated within the chamber 32, the diaphragm 31 is sucked downward,loweringthe rod 44;, swinging the member 53, causing the pawl 55 tooperate on the ratchet 56 and wind the spring 57, and at the same timethe plate 60 is swungdownward by thearm 58", rocking theishaft Glandopening the valve 62-.

This. establishes communication between the interior of the casing andthe interior ofthe pipe 3%, with the result that a suction is createdwithin the chamber and the atmospheric pressure 1n the chamber 12reduced so as to allow the spring 4:6. to act to return the diaphragm toraised position, this raising movement occurs almostv immediately- 7after the downward movement. The spring 57 having been wound through theaction of the 'rod'4t4, as previously described, the mech anismcontinues to operate for a predeterminedperiod of time. As soon as theplate 60 hasibeen swung upward a suflicient distance by means of thepins 59'acting on the finger .62 the spring pressed arm 66 acts to.swing the -plate upward'into the position shown in Fig. 5, rocking theshaft 61 and closing the valve 63, cutting off communication between thepipe 34: and the interior of the. casing above the diaphragm, andallowing the suction'to be again exertechwithin the chamber 32 below thediaphragm.

Through the medium of the clock work mechanism, the recording sheetadvanclng means 1s operated and the record sheet drawn past the smokenozzle, the smoke being projected thereon and the record made At eachmovement of the rod 44: the shaft 71* is rocked, tipping the nozzle 7 0to carry the projecting end out of alinement with the recordsheet, andthe rod 73 is moved to scavenge the nozzle.

Aspring 80 is connected to the stem 43 of the diaphragm 38, so that,when the diaphragm is moved into the chamber36, itis moved against thetension of this spring,

1 and any adjustment of the tension canbe obtained by manipulating. afinger piece 81' which moves a stem 82 and'expands or con- I tracts, thespring.

,the most desirable.

The foregoing description has been confined almost entirely to themechanical parts of the device, together with their arrangement andoperation,and to fully understand the invention it is deemed expedientto include a description of the action of the various pressures andtheir influence on the proper recording of the gases. First, itmust beunderstood that thereis intended to bea continuous flow of gas from thedis charge nozzle against the record sheet, and a passage of this gasout from the interior of the casing 12. In order to have this flowcontinuous, the degree of vacuum within the interior of the casing mustbe somewhat greater than the degree of vacuum within the smoke stack orother place from which the samples of gas are being extracted.Otherwise, obviously a flow through the gas pipe 71 into the interior ofthe casing would not take place. Moreover, it is not desirable to have avery marked differ- V .ence in the degree of vacuum within the easingand the place from which the sample of smoke or gas is being taken,since this would cause too violent a flow of the smoke and wouldnot makea clear record. A smooth continuous and gentleflow of the gases is Theflow should be continuous or practically so, as otherwise the gas wouldbe drawn out in wads or chunks, so that an accurate registration wouldnot be made of-the flowthrough the stack. It

is to accomplish these results that the means for regulating thepressure within the casing has been provided.

Assume for the purpose of illustration that a vacuum equal to seveninches in water is present in the stack from which the samples of smokeare being extracted, and assume that it is desirable to maintain avacuum of eight inches in water within the casing. A pipe 35 which leadsfrom the stack will exert an influence on the diaphragm 38 equal to avacuum pressure of seven inches in water. This will position the slidingperforated tube 42 so that a registration will be effected between theperforations in this tube 42 and the perforations in the sleeve 41 topermit a certain amount of outside air to the inside of the casing.

Now assume that a continuous vacuum of seventeen inches in water isbeing exerted through the pipes 33 and 34: from the steam injector orother vacuum creating means. When the valve 63 is thrown open so as toestablish communication between the pipe 34 and the interior of thecasing, the vacuum being exerted in the pipe 34 which, as stated, isseventeen inches in water, will be exerted within the casing, and thisvacuum will be reduced by the outside air coming in through the alinedopenings in the sleeve 41 and tube 42, so that there will be a vacuum ofeight inches in water produced within the casing.

This will be a greater vacuum than the seven inches in water vacuumwithin the stack, and will cause the smoke to pass out of the dischargenozzle on to the record, from whence it will be drawn through the pipe34- out of the casin Of course, when the valve 68 is open, it willimmediately cause a decrease in the vacuum within the chamber 32 with aresultant uplifting of the diaphragm 31 as previously explained.

In certain forms of apparatus, especially locomotives, the degree ofvacum within the stack will vary from zero to fifteen inches in water,and in order to maintain a proper correlation between the vacuum in thestack and the vacuum within the casing, means must be provided forregulating the vacuum within the casing in accordance with thefluctuations of the vacuum Within the stack, and this is where thediaphragm 38 comes into use. Assume that the vacuum in the stack shouldchange from seven inches in water to twelve inches in water. Obviously,such increased vacuum force will pull the diaphragm 88 toward thechamber 36. This will result in a decrease in the size of the registeredopening in the sleeve 1-1 and tube as permitting an entrance of outsideair into the casing, so that, when communication is established betweenthe pipe 3 1 and the interior of the casing, the vacuum released intothe interior of the casing through the pipe 84 which, as stated, isseventeen inches in water, will be less reduced by the amount of airadmitted to the casing than was the case where seven inches in waterexisted in the stack and more outside air was admitted to the interiorof the casing. Thus with twelve inches in water vacuum in the stack, thevacuum finally created in the casing will be, say, thirteen inches inwater, or thereabout. By this arrangement the vacuum passing through thepipe 34, which is constant, is reduced, when admitted to the interior ofthe casing, by an admission of out side air to the interior of thecasing, which air is admitted in direct proportion to the degree ofvacuum within the stack, and thus a final vacuum is created within thecasing which is at all times of a predetermined greater degree than thevacuum within the stack, thus causing a continuous and even flow of thesmoke into and out of the casing, which gives an eflicient record.

1 claim:

1. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, for projecting thereon gas under testmeans operatively connected for moving said record sheet past saidnozzle, said moving mechanism being actuated when certain relative airconditions are brought about between th i i o t e series a amber Q1 sideof said casing, the air conditions in the latter being furnished from asource separate from the source of gas under test, sub stantially asdescribed.

2. In a device oi the class described, the combination of a casing, arecord s ieet with in the casing, a projecting nozzle in operativerelation to the record sheet for projecting thereon gas under test, andmeans operatively connected for moving said record sheet past saidnozzle, said operating mechanism being actuated when certain relativeair conditions are brought about between the inside of the casing and achamber outside of said casing, the air conditions in the latter beingfurnished from a source separate from the source of gas under test,substantially as described.

3. In a device of the class described, the combination of a casing, arecord sheet with in the casing, a projecting nozzle in oper ativerelation to the record sheet for projecting a gas under test onto saidsheet, means operatively connected for moving said record sheet pastsaid nozzle, a shiftable member for actuating said means, said shiftablemember being moved by a creation of air conditions supplied from asource other than the source of gas under test, substantially asdescribed.

4-. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means operatively connected for movingsaid record sheet past said nozzle, and a shiftable member operativelyconnected to said operating means, said shiftable member being oper atedby air conditions above and below the same, the air conditions on oneside thereof being supplied from a source other than the source of gasunder test, substantially as described.

5. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means operatively connected for movingsaid record sheet past the nozzle, a shilitable division wall within thecasing, means for shifting said wall controlled by air conditionssupplied from a source other than the source of gas under test, and anoperative connection between said record sheet moving means and saidshiftable wall, substantially as de' scribed.

6. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a diaphragm, an operative connection between the diaphragm andrecord sheet moving mechanism, and means for raising and loweringthediaphragm at periodical intervals controlled by air conditions suppliedfrom a source other than the source of gas under test, substantially asdescribed.

'7. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle 1n operativerelation t'o'the record sheet, means for moving thev record sheet pastthe nozzle, a diaphragm, a connection between the diaphragmand recordsheet operating means, means for creating a suction belowthe'diaphragm'to draw the same downward, and

, tension means for restoring the diaphragm to normal scr bed. I s

8. In a devlce position, substantially as deof the class described, the

} combination of a casing, a record sheet within the casing,'aprojecting nozzle in open ative relative to the record sheet, means formoving the record sheet past the nozzle, a diaphragm, a connectionbetween the diaphragmand said record sheet moving means,;me ans forperiodically creating a suction to actuate said diaphragm downwardly,and-tension means 'for restoring the diaphragm to normal position,substantially as described. r V

9. In a device of the'classdescribed', the

, combination of a casing, a record sheet within the casing, aprojecting nozzle in operative relation to the record sheet, a sprinactuated mechanism for moving the record sheet past the nozzle, andmeans for automaticallyrewlnding the spring of the rec- 0rd sheet movingmechanism,substantially as'described.

" within the casing, ajpro j ectin nozzle in oppi; sheet past'the nozzleembodyingcl'oclcwork mechanism, and meansfor periodically regeneratingtheactua-ting power for said clockwork mechanism, substantially asdeerative relation to the recorcfsheet, clockw'ork',mechamsm' for movingsaid record scribed. V

l V 12'. In a device of the class described, the

combin-ationf'ofa "cas ng, a record sheet within thecasing, a projectingnozzle in operaftiverelationto the rrecord sheet, clock- .vvork'mechanism fornnoving the record sheet past the nozzle embodyingclack-work mechanism, and suction actuated meansv for P regenerating,powerto actuate said. clock-' work'mechanism, substantially asdescribed. 7 13, Ina dev es the class described the combination of acasing, a record sheet within the casing, a projecting nozzle inoperative relation to the record sheet, clockwork mechanism for movingthe record sheet past the nozzle comprising a diaphragm and clock-workmechanism, means for actuating the diaphragm at intervals, and aconnection between the diaphragm and clock-work mechanism, whereby ateach actuation of the diaphragm a regeneration of actuated power isgiven to the clock-work mechanism, substantially as described.

14;. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projectin nozzle in operative relationto the recor sheet, elockwork mechanism for advancing the record 1 sheetpast the nozzle comprising a shiftable member and clock-work mechanism,and a connection between the shiftable member and clock-work mechanism,whereby at each operation of the shiftable member power isregene'ated'for actuating the clock-work mechanism, substantially asdescribed.

15. In a device of the class described, the combination of a casing, arecord sheet within the casing, a nozzle'in operative re- 7 lat-ion tothe record sheet, means for moving the record sheet past the nozzle, ashiftable member, a connection between the shiftable member and recordsheet moving mechanism, means for creating a suction on one side of theshiftable member, means for admitting atmospheric pressure to the otherside of the shiftable member, and tension means for restoring thediaphragm to normal position, substantially as described.

'16. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a diaphragm, a connection between the diaphragm and record sheetmoving means, means for creating a suction on one side of the diaphragm,means for admitting atmospheric pressure to the other side of thediaphragm, and means for controlling the flow of atmospheric pressure inaccordance with the degree of suction in the stack, substantially asdescribed.

17 a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a shiftable member, means for creating a suction on one side ofthe shiftable member, and valvular means for admitting atmosphericpressure to the other side of the shiftable member, said valvular meansbeing actuated by suction from the stack, substantially as described.

l8. ln a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a vacuum suction pipe, and means for automatically andperiodically establishing communication between the suction pipe and theinterior of the casing, substantially as described.

19. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a shiftable member, a suction tube leading to one side of theshiftable member, and means for controlling communication between saidsuction tube and the interior of the casing, said means operating atperiodical intervals and in accordance with the downward movement of theshiftable member, substantially as described.

20. In a device of the class described, the combination of a casing, arecord sheet within the casing, a nozzle in operative relation to therecord sheet, a shiftable member, a suction pipe leading to one side ofthe shiftable member, and a valve controlled means of communicationbetween the interior of the casing and the suction pipe, said valvebeing actuated in accordance with the movements of the shiftable member,substantially as described.

21. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, means for regenerating power to actuate said record sheet movingmeans, a suction pipe a valved communication between said suction pipeand the interior of the casing, a connection between said valvular meansand record sheet moving means, whereby said valve is opened atperiodical intervals and is held open for a predetermined length oftime, and means for closing said valve, substantially as described.

22. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past theprojecting nozzle, and means for subjecting the gases to the action ofheat prior to their projection from the nozzle, substantially asdescribed.

23. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a conduit for conducting the gases to the nozzle, and means forheating said conduit, substantially as described.

24. In a device of the class described, the

combination of a casing, a record sheet within the casing, a projectingnozzle in operative relation to the record sheet, means for moving therecord sheet past the nozzle, a tube for conducting gases to the nozzle,a acket surrounding said tube, and means for heating said jacket,substantially as described.

25. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a conduit for conducting the gases to the nozzle, and a steamjacket surrounding the conduit, substantially as described.

26, In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, a conduit for gases leading to the nozzle, a jacket about saidconduit, and means for heating said jacket, said heated jacket servingto dry the gases and to heat the interior of the casing, substantiallyas described.

27. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, means for conducting gases to the nozzle, and means forperiodically scavenging the discharge orifice of the nozzle,substantially as described.

28. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle,

ing means for automatically scavenging the discharge orifice of thenozzle, substantially as described.

30. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for conducting gases to thedischarge nozzle, a plunger for scavenging the discharge orilice of thenozzle, and means for periodically and automatically ope "ating saidplunger, substantially as described.

31. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for .moving the record sheet pastthe nozzle, means for conducting gases to the nozzle,

means for periodically scavenging the dis charge orlfice 'ofthe nozzle,and means for bringing the-discharge end of the nozzle and .the recordsheet out of alinement during '.moving the'record sheet past the nozzle,

means for conducting. gases to the nozzle, means for scavenging thenozzle, and' means for bringing the discharge end of the nozzle and therecordjsheet out of alinement during the scavenging operation,substantially as described. r r

In a'device of the class described, the

combinationof a casing, a record sheet with the casin a projectingnozzle in' operative relation to the record sheet, means for moving therecord sheet past the nozzle, means operated by said record sheet movingmeans for automatically scavenging the nozzle, and means for bringingthe discharge end of the nozzle and the record sheet out of alinementduring the scarenging operation, substantially as described.

3%. In a device of the class described, the combination of a casing, arecord sheet within the casing, a projecting nozzle in operativerelation to the record sheet, means for moving the record sheet past thenozzle, means for conducting gases to the nozzle, a plunger forscavenging the nozzle, means for periodically operating said plunger,and means for bringing the record sheet and discharge end of the nozzleout of alineinent during the scavenging operation, substantially asdescribed.

RAY L. EDDY. lVitnesses lVM. P. Bonn,

MAR ARET F. EDDY.

Gopiesof this patent may be obtaixied for five cents each, by addressingthe Commissioner of Patents,

, Washington, D. C.

